The Siphon filter The Siphon filter 2008 International Symposium on Household Water Management. Accra, Ghana June 2008 Connect International Connect International

The problem

One of the solutions, Candle filters Models of $

A new option The Siphon filter 7-12 $

Parts -filter element -prefilter -siphon hose -rubber bulb -one way valve -tap With the bulb, vacuum is created until water starts flowing Unclog by backwashing

Features Element Diatomaceaous Earth & Silver Element Diatomaceaous Earth & Silver Siphon generates flow litres/hr Siphon generates flow litres/hr Efficient, 4 – 5 log reduction E Coli Efficient, 4 – 5 log reduction E Coli Unclog by backwash option, longer life of element Unclog by backwash option, longer life of element Uses existing water storage, buckets, pots Uses existing water storage, buckets, pots Small (Transport. Storage in shops) Small (Transport. Storage in shops) Affordable 7-12 US$ Affordable 7-12 US$ Atractive, high market potential Atractive, high market potential

Test results After filtering 7390 Litres Element scraped from 55 mm to 49 mm Log reduction E coli 4,5 (Without silver 2,7 ) Tested by Waterlaboratorium Noord

R&D Developed by Klaas van der Ven. Basic Water Needs. 7 years Klaas van der Ven. Basic Water Needs. 7 years Funded by Aqua 4 all Funded by Aqua 4 all Field tested by Connect International, ARRAKIS (2 years) Connect International, ARRAKIS (2 years) Funded by DGIS, Partners voor Water Funded by DGIS, Partners voor Water

Training in use. Mozambique

Sustainability Produced, transported, sold by private sector Produced, transported, sold by private sector Profit based sustainability Profit based sustainability

Dissemination Commercial market Urban sector Urban sector Rural sector, middle class Rural sector, middle class How to reach the poorest? NGOs are needed NGOs are needed NGOs should not distribute themselve, create supply chain! NGOs should not distribute themselve, create supply chain! Use voucher system Use voucher system Distribution

Marketing safe water Publication by Urs Heierli Compares all treatment options Compares all treatment options Explains what went wrong with upscaling Explains what went wrong with upscaling Suggestions for massive upscaling of HWTs Suggestions for massive upscaling of HWTs A must read!!!

Local production CI and PfP started in Mozambique, Nicaragua

Storage

New option, Plation Ceramic & silver

Low cost option. Silver disc Ceramic impregnated with Colloidal silver Cost 0.2 $ Tested by BWN, CI, PfP

Recontamination A problem in receptacles of CWPs (potfilters)Idea Make discs (8x8 cm) of broken pot filters Make discs (8x8 cm) of broken pot filters Place it in the receptacle Place it in the receptacle

Ideas on low cost Water, sanitation Smart Water Solutions Smart Water Solutions Smart Water Harvesting Solutions Smart Water Harvesting Solutions Smart Sanitation Solutions Smart Sanitation Solutions Published by NWP (Netherlands Water Partnership)

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